Peng Xiaoming, Lin Zhiwei, Francois Chin Po Shin, Png Khiam Boon
ZL 20880100248.8 (2013-04-24), 157566 (2010-12-31)
A Multi-band Space-Frequency Transmit Selection (Multi-band SFTS) technique is proposed for MB-OFDM UWM systems with multiple transmit antennas. It achieves transmit diversity effectively in both spatial and frequency domain through intelligent subcarrier allocations for each antenna at each sub-band, while maintaining the interoperability with current standard WiMedia device and meeting the requirement of FCC spectrum mask. 2 different calibration methods proposed to overcome the mismatch among multiple front-end chains. It is an elegant low-cost transmit diversity technique for MB-OFDM UWB system that enables to extend the transmission range or/and enhance the robustness over shadowing fading channel.